Scarifier.



W. A. GILLETTE.

SCARIFIER.

APPLIGATION FILED MAY 1, 1911.

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SCARIFIER.

A1 PLmAToN FILED MAY1,1911.

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WALTER A. GILLETTE, 0F. LOS ANGELES, CALIFORNIA, ASSIGNOR TO PETROLITHICPAVEMENT COMPANY, OF LOS ANGELES, CALIFORNIA.

SCARIFIER.

Specification of Letters Patent.

Patented Sept. 3, 1912.

Application led May 1, 1911. Serial No. 624,498.

To all whom t may concern.'

Be it known that I, WALTER A. GILLETTE, a citizen of the United States,residing at Los Angeles, in the county of Los Angeles and State ofCalifornia, have invented certain new and useful Improvements inScariliers; and I do hereby declare the following to be a full, clear,and exact description of the invention, such as will enable othersskilled in the art to which it appertains to make and use the same.

This invention relates to improvements in scari'fiers and particularlyto a gang scarier which is especially designed for tearing up hardroadways, though not so limite The object of the invention is to providea scariier having a plurality of scariling spikes arranged in wedgeformation and secured to an adjustable truck frame either end of whichmay be independently adjusted to permit the scarifying spikes topenetrate the ground at Varying depths and angles.

A" further object of the invention is to build such a machine of rigidand durable construction to withstand severe usage, and which is easy tooperate.

With the above and other objects in View as will hereinafter appear, theinvention consists in? certain combinations and arrangements of theparts which will be fully described and the novel features thereofparticularly pointed out in the appended claims.

The preferred embodiment of the invention is illustrated in theaccompanying drawings, in which like characters of reference indicatecorresponding parts.

Figure 1 is a side elevation of a scariier constructed in accordancewith my invention, Fig. 2 is a plan view of same, Fig. 3 is a sideelevation on an enlarged scale of the front end of the machine, certainportions being broken away to more clearly show the construction, andFig. 4 is a sectional view taken on line 4-4 of Fig- 3.

, In the drawin s the frame of the ma.- chine is com se of a pair oflongitudifnally extendlng metal beams 1 and from f the forward end ofeach extends a backwardly diverging beam 2, to which is secured as at 3a longitudinal beam 4 arranged 1n` spaced parallel relation on theoutside of the beam 1, and said beams are joined together by a pluralityof transverse beams 5, 6, 7, and 8.

Rigidly secured to the under side of the beams 5 and 6 'and central ofthe forward end of the frame is a scarifying spike 9 formed at its rearend with a downwardly curved portion 10 which projects forwardly and isinclined downwardly, and carries al detachable blade 11 havingboth itsupper and lower edges beveled in order that when one edge becomesunserviceable the other may be substituted. Faster-.ed to the transversebeams 6 and 7 and arranged on the outside of the scarifying spike 9 aresimilar scarifying spikes 12, and carried by the transverse beams 7 and8 outwardly from the scarifying spikes 12 are other similar scarifyingspikes 13, Byv thus arranging the scarifying spikes in wedge formation,less pulling power is required as the forward scarifying spike cuts afurrow in advance thereby leaving loosened ground on the 'inner sideofthe blades of the other scarifying spikes.

The rear end of the frame, is supported by wheels 14 arranged outside ofthe frame and each wheel is rotatably mounted on the crank arm 15 of acrank 16, journaled in bearings 17 which are xed to the under sides ofthe beams 1 and 4. Mounted on each crank 16 between said bearings is atoothed sector 18 which is engaged by a worm 19 on an inclined shaft 20journaled in the ends of a box 2l'partially inclosing the worm andcarried-by brackets l22 pro'- jecting upwardly from theV beams 1 and 4.Near the upper end of the inclined shaft 20 is a bevel gear 23 whichmeshes with the bevel pinion 24 rotatably mounted on a shorthorizontalshaft 25 supported by inclined bars 26 rigidly secured to the beams 1and 4 and suitably braced as at 27. The upper end of the inclined shaft20 is journaled in a crossbar 28 connected to the bars 26. A hand-wheel29 is fixed to each pinion 24`which is manually operated to adjust therear end of the frame.

The front end of the frame is pivotally and adjustably supported onwheels in the following manner. The front wheels 30,

which are of less diameter than the rear wheels 14, are rotatablymounted on an axle 3l having an enlarged central portion 32 to which ispivotally connected as at 33 a forked piece 34 having a verticaltrunnion 35 which is journaled in a block 36 carried by a pair ofuprights 37 joined together at their upper en s by a crosspece 38.Pivotally connected to each upright 37 .at 39 is ra link 40, the otherends of which are pivotally connected at 41 to the upper ends offorwardly inclined bars 42 projecting from the beams 1. A brace 43extends from each inclined bar to the beam.

Passing through beam 1 of the frame is a cross-shaft 44 on which ismounted a toothed sector 45 having rigidly secured to each side aroundthe worm 50 and the lower end of said inclined shaft 49 yis journaled inits end.l Near the upper end of the inclined' shaft 49 is a bevel gear53 which is engaged by a pinion 54 rotatably mounted on a cross shaft 55supported by brackets formed by inclined bars 56 and braces 57 connectedto the beam 1. A plate 58 is secured to the shaft 55 by clips 59 andforms a bearing for the upper end of the inclined shaft 49. A hand-wheel60 is fixed to the pinion 54 and the .forward end of the frame Iisadjusted -in a similar manner-,as the rear end by turning same.

Projecting forwardly from the front ends of the longitudinal beams 1 isa yoke 61 to which is pivotally connected a tongue 62 for drawing andguiding the machine, Secured to the underside of the tongue is a rod. 66extending longitudinally therewith, on which rod is slidably mounted thehead 67 of a forked bracing member 63 having its legs pivotallyconnected to members 64 fixed to the front axle 31. By so connecting thebracing member to the tongue, lateral movement of the tongue ispermitted, and the frame of the machine is adjustable on the frontwheels.

It is apparent from the foregoing that the rear end of the frame may beadjusted by operating the rear hand-wheels which will rotate the toothedsectors and turn the cranks on which the rear wheels are mounted. Byrotating the forward hand-wheel the toothed sector will be rotated onits shaft which is carried by the frame and the pivota'l joints 47 and39 will follow the arcs 65 as shown in Fig. 3.

Although the elements set forth and described are fully adapted tolaccomplish the purposes for which they are intended, it is to beunderstood that slight changes in the form, proportion and minor detailsof'con- `struction may be resorted to without sacricing any of theadvantages or departing from the spirit of my invention.

Having fully described my invention, what I claim is 1. In a scarifier,the combination of a frame, scarifying spikes depending from the frame,means for adjustably supporting the rea-r end of the frame, a frontaxle, wheels mounted on the axle, a trunnion projecting from the axle, ablock for thel trunnion, uprights secured to the block, a toothed sectorrotatably mounted at the forward end of the frame, means pivotallyconnecting the sector to the uprights, a link connecting each upright tothe frame, and means for rotating the sector, substantially asdescribed.

2. In a scarifier, the combination of a frame, scarifying spikesdepending from the frame, means for adjustably supporting the rear endof the frame, a front axle, wheels mounted on the axle, a trunnionprojecting from the axle, a block forthe trunnion, uprights secured tothe block, a toothed sector rotatably mounted at the forward end of theframe, means pivotallv connecting the sector to the uprights, a linkconnecting each upright to the frame, a. worm in mesh with the sector, ashaft fixed to the worm, a box supported from the frame and surroundlngthe worin, a gear wheel on the shaft, a bracket rojecting from theframe,4 a s econd sha t supported by the bracket, a pmion rotatablymount-ed on the second shaft and engaging the gear wheel, a hand-wheelsecured to the pinion, and a plate attached to the second shaft, theupper end of the first shaft being journaled in said plate,substantially as described.

3. In a scarifier, the combination of a frame, scarifying spikesdepending from the frame,.means for adjustably supporting the rear endof the frame, a front axle, wheels mounted on the axle, a trunnionprojecting from the axle, a block for the trunnion, means pivot-allconnecting the block to the forward end o the frame, means for adjustingthe forward end of the frame with relation to the block and holding itin locked position, a tongue projecting from the forward end of theframe, and means for bracing the tongue from said axle, substantially asdescribe 4. In a scarifier, the combination of a frame, scarifyingspikes depending from the frame, means for adjustably supportin the rearend of the frame, a front axle, -w eels mounted on the axle, atrunnionprojecting from the axle, a block for the trunnion,

means pivotally connect-ing the block to the said axle andslidablyconnected to the bar, forward end of the frame, means foradsubstantially as described. v 10 justing the forward end of `the framewith In testimony whereof, I aix my signarelation to the block andholding it in ture, in presence of two witnesses.

locked position, a tongue pivoted to the for-` WALTER A. GILLETTE. Wardend of the frame and capable of lat- Witnesses: eral movement, a barfixed to the/tongue'| K. F. PosTLE,

end bracing members pivot-ally connected to EDYTH PALMER.'

